Materials Literature
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The dc conduction behavior of thin films of SrBi2Ta2O9 (SBT) has been investigated on the basis of space-charge limited current theory. The theory was generalized to account for the traps, which were inevitably present in this case. The relative percentage of trapped injected charge and the free injected charge was se…
During sliding, the grain-boundary (GB) energy depends on the atomic structures produced during relative translation of the two grains. The variation in the GB energy within the two-dimensional boundary unit cell (BUC) constitutes the GB-γ surface. Maxima in the slope of the γ surface determines the sliding resistance…
Mo 5 Si 3 ‐particle‐reinforced Si 3 N 4 ‐matrix composites were fabricated by sintering molybdenum‐solution‐infiltrated porous Si 3 N 4 . Fine Mo 5 Si 3 particles, with an average diameter of ∼0.13–0.17 μm, grew in situ from the reaction between MoO 3 and Si 3 N 4 in the grain boundary of the Si 3 N 4 . The Mo 5 Si 3…
During the past eight years, the authors have extensively studied the properties of linear homogeneous bianisotropic media. They have studied the Green's dyadics, the factorization of the Helmholtz determinant operator, the field and source decomposition, and plane-wave propagation in various classes of these media. W…
The effect of partial substitution of tungsten for molybdenum on the microstructure and corrosion resistance in 22Cr–5Ni–3Mo duplex stainless steel (DSS) has been investigated following aging heat treatments in a temperature range of 600-1000°C. Electrochemical tests were carried out for the evaluation of corrosion re…
Amorphous films in the system Al 2 O 3 –Y 2 O 3 were prepared by the rf sputtering method in the range of 0–76 mol% Y 2 O 3 , and their density, refractive index, and elastic constants were measured. All of the physical properties of the amorphous Al 2 O 3 –Y 2 O 3 films had a similar compositional dependence; that is…
Although there are many studies related to predicting the dimensions of knitted fabrics, there are no studies available about predicting the knitting machine used to produce the knit. Until now, the decision to select a knitting machine was made through experience, trial and error, or rough calculations. This study pr…
Smooth muscle cell proliferation plays a major role in the genesis of restenosis after angioplasty or vascular injury. Local delivery of agents capable of modulating vascular responses, have the potential to prevent restenosis. However, the development of injectable microspheres for sustained drug delivery to the arte…
The decomposition kinetics of poly(vinyl butyral) binder from barium titanate multilayer ceramic capacitors with platinum metal electrodes were analyzed by thermogravimetric analysis as a function of the heating rate. The activation energy and pre‐exponential factor for the decomposition kinetics were determined from…
Threonine synthase catalyzes the final step of threonine biosynthesis, the pyridoxal 5'-phosphate (PLP)-dependent conversion of O-phosphohomoserine into threonine and inorganic phosphate. Threonine is an essential nutrient for mammals, and its biosynthetic machinery is restricted to bacteria, plants, and fungi; theref…
The optical gaps of B2O3 alkali borate, and alkali fluoroborate glasses were determined by using blown films. The gap of B2O3 glass was 8.0 eV and the value decreased monotonically with decreasing the B2O3 content in both fluoroborate and borate glasses. When compared at a constant B2O3 content, the gap is in the orde…
For the first time, the grain boundary diffusion was investigated in a nanocrystalline material in the whole spectrum of possible kinetic regimes: types-C, B, AB, and A. The microstructure of the nanocrystalline gamma-Fe-40 wt.% Ni alloy revealed two different levels of organization: the individual nano-scaled grains…
Abstract The influence of elasticity of the blend constituent components on the size and size distribution of dispersed‐phase droplets is investigated for blends of polystyrene and high density polyethylene in a simple shearing flow. The elasticities of the blend components are characterized by their first normal stre…
Differently synthesised layered double hydroxides (LDH) were characterised by using XRD, N2 adsorption, DTA/TG and 27Al NMR. The results of these investigations are discussed with respect to the crystallinity and purity of the material in dependence on the preparation method (without aging, aging at 20 °C, aging under…
Collagen is the major structural protein in skin, bone, tendon, cartilage and blood vessels. Its triple helical structure has been long studied by fibre diffraction. More recently, single crystal X-ray diffraction on collagen-like polypeptide models has allowed a significantly improved description of the triple helix…
Luminescent silicon oxides containing radiative centers were obtained by using two different techniques. Silicon rich silicon oxides (SRSOs) were fabricated by rf magnetron sputter deposition and Ge-implanted SiO2 films were fabricated by ion implantation following the thermal oxidation of Si. Blue and violet photolum…
Elastic properties and tensile strength of single-walled carbon nanotubes, which have topological and coordinated defects, under hydrostatic pressure have been studied by using molecular-dynamics simulations and ab initio electronic structure calculations. The Young's moduli in both the axial direction and the radial…
The structure of barium nitrate crystals grown from supersaturated aqueous solutions under normal conditions and during centrifugation at 11.8×10 3 g is studied for the first time by a high-precision powder neutron diffraction method. It is established for the first time that centrifuging leads to displacement of the…
Aliphatic polyketone (PK) contains both non-polar aliphatic units and polar carbonyl groups, which make it an ideal and unique candidate for modifying non-polar polymer systems containing purely alkyl chains,such as polyalkenes. A new polymer blend system based on polypropylene (PP) and aliphatic polyketone has been p…
Results are provided of the experimental investigation of radioactive fission product (RFP) release, i.e., krypton, xenon, and iodine radionuclides from fuel elements with initial defects during long-term (3 to 5 yr) irradiation under low linear power (5 to 12 kW/m) and during special experiments in the VK-50 vessel-t…